Let's first simplify the expression inside the brackets:

1_3 + 7_9 - 5_12 = 1 + 3/10 + 7 + 9/10 - 5 - 12/100
= 1 + 0.3 + 7 + 0.9 - 5 - 0.12
= 1.2 + 7.9 - 5 - 0.12
= 8.1 - 5 - 0.12
= 3.1 - 0.12
= 3.08

Now, let's calculate (1 - 16_25):

1 - 16/25 = 1 - 0.64
= 0.36

Multiplying both results:

3.08 * 0.36 = 1.1088

Finally, multiplying by 2:

1.1088 * 2 = 2.2176

Therefore, the final result is 2.2176.